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  • The Universe. How big is it? Does it have a center? Does it have an edge?

    宇宙,到底有多大?它有多大?它有中心嗎?它有邊緣嗎?

  • Is it getting bigger, and if so, why?

    是否越來越大,如果是,為什麼?

  • Well, we know that there are two different meanings for "universe" - first, the

    好了,我們知道,"宇宙"有兩種不同的含義--第一,是"宇宙"。

  • "observable universe" is everything that we've been

    宇宙是我們一直以來的一切。

  • able to see, or observe, thus far. And second,

    能夠看到,或觀察到的,是以。而第二。

  • "The Universe" (or "the whole universe") means

    "宇宙"(或"整個宇宙")是指

  • everything that exists or has existed, or will exist.

    一切存在的或已經存在的或將要存在的東西。

  • More specifically, the observable universe

    更具體地說,可觀測的宇宙

  • is the region of space visible to us from earth. And since The Universe is only about

    是我們從地球上看到的空間區域。由於宇宙只有大約

  • 13.8 billion years old and light takes time to travel through space, then regardless of

    138億歲,光在太空中傳播需要時間,那麼不管是

  • what direction we look, we see light that's been traveling (at most) 13.8 billion years.

    我們看什麼方向,我們看到的光,'已經行駛(最多)138億年。

  • So it's logical to think that the observable universe must then be 2*13.77 = 27.5 billion

    所以合乎邏輯地認為,可觀測到的宇宙那麼一定是2*13.77=275億的

  • light years across - but it's not. That's because over time, space has been expanding,

    光年跨度--但它'不是。那是因為隨著時間的推移,空間一直在擴張。

  • so the distant objects that gave off that light 13.8 billion years ago have since moved

    所以138億年前發出那道光的遠古天體已經移動了

  • even farther away from us. Today, those distant objects are a bit more than 46 billion light

    離我們更遠的地方今天,這些遙遠的天體比460億光年多一點

  • years away. Multiply times two and you get 93 billion light years: the diameter of the

    年的距離。乘以2,你得到930億光年:直徑為1.

  • observable universe.

    可觀測的宇宙。

  • To give you a sense of scale, the size of the earth within the observable universe is

    為了給你一個尺度感,地球在可觀察的宇宙中的大小為

  • roughly equivalent to the size of a virus within the solar system - although that doesn't

    大致相當於太陽系內病毒的大小--雖然這並不'。

  • help much because we can't really appreciate the incomprehensible smallness of a virus

    因為我們無法真正體會到病毒難以理解的渺小。

  • nor the bewildering bigness of the solar system, either.

    也沒有太陽系的茫茫大度,。

  • \ So let's just say that the observable universe

    \ 所以我們可以說,可觀測到的宇宙... ...

  • is stupendously big. But The Whole Universe, as far as we can tell, is a lot bigger - space

    是驚人的大。但整個宇宙,就我們所知,要大得多--空間... ...

  • is most likely infinite! Or at least it doesn't have an edge, though the difference between

    很可能是無限的!或者說至少它沒有優勢,雖然這兩者之間的區別是

  • those is another story unto itself.

    這些是另一個故事本身。

  • Now, what about the center of the universe? Well the

    現在,宇宙的中心呢?那麼

  • observable universe

    可觀測宇宙

  • has a center - Us! We're at the center of

    有一箇中心--我們我們的中心是

  • the observable universe because the observable universe is just the region of space visible

    可觀測宇宙

  • from earth, and kind of like how the view from a very tall tower is a circle centered

    從地球上看,有點像從很高的大廈上看,是一個圓心的圓圈

  • on the tower, the piece of space we can see from here is naturally centered here. In fact,

    在塔上,我們能從這裡看到的那片空間自然是以這裡為中心。其實。

  • if you want to be more precise, EACH ONE OF US is the center of our OWN observable universe.

    如果你想更精確的話,我們每個人都是我們自己的可觀測宇宙的中心。

  • But that doesn't mean we're at the center

    但這並不意味著我們'在中心

  • of The Whole Universe, just like the tower isn't the center of the world - it's the center

    就像塔不是世界的中心一樣,它是世界的中心。

  • of the piece of the world that it can see - up to the horizon. But just because you

    它能看到的那片世界--直到地平線。但就因為你

  • can't see beyond the horizon doesn't mean there's nothing there.\

    不能看到地平線以外的地方並不意味著那裡什麼都沒有。

  • And so it is with the observable universe.

    可觀測的宇宙也是如此。

  • Looking up at the sky, we see light light that's at most 13.8 billion years old and

    仰望天空,我們看到的是最多138億年前的光亮,而

  • coming from stuff that's now 46 billion light years away. Anything farther is "beyond the

    來自於現在460億光年外的東西。任何更遠的東西是"超越了。

  • horizon". But each second, we see new, even older light

    地平線"。但每一秒鐘,我們都會看到新的,甚至是更古老的光線

  • coming from slightly farther away (one light-second

    遙遙無期

  • farther, to be precise), and so our view of the cosmos is literally getting bigger all

    準確地說,是更遠的地方),所以我們對宇宙的看法從字面上看是越來越大了

  • the time - all we have to do is wait and watch as the universe ages and light from more distant

    我們所要做的就是等待和觀察宇宙的老化和來自更遙遠的光。

  • places has the time to get to us.

    地方有時間去找我們。

  • So here we are, sitting at the center of our observable piece of the Whole Universe.

    所以我們在這裡,坐在我們可觀察的整個宇宙的中心。

  • How big is the universe? Well, the observable

    宇宙有多大?嗯,可觀察到的

  • universe is currently 93 billion light years across. The Whole Universe is

    宇宙目前直徑為930億光年。整個宇宙是

  • probably infinite.

    可能是無限的。

  • Does the universe have an edge? The observable does (it's 46 billion light years away in

    宇宙有優勢嗎?可觀測到的有(它在460億光年外的地方,在

  • any direction), and The Whole Universe has a temporal edge (or what we call a beginning)

    任何方向),而整個宇宙有一個時間的邊緣(或我們稱之為開始)。

  • but almost certainly not a spatial one. Does the universe have a center? Again, the

    但幾乎可以肯定不是一個空間的。宇宙有中心嗎?同樣,

  • observable universe does: YOU! The Universe as a whole? Almost certainly not.

    可觀測的宇宙確實如此。你! - 宇宙作為一個整體?宇宙作為一個整體?幾乎肯定不是。

  • And is the universe getting bigger? Yes - space is expanding, which makes both the observable

    宇宙是否在變大呢?是的--空間在膨脹,這使得可觀測到的東西都在膨脹

  • universe and the whole universe bigger - plus, over time, we see older and older light coming

    宇宙和整個宇宙更大的 - 另外,隨著時間的推移,我們看到越來越老的光來了

  • from farther and farther away, so our observable universe gets bigger that way, too.

    從更遠的地方來,所以我們的可觀測宇宙也會這樣變大。

  • And that, in a nutshell, is our view from

    簡而言之,這就是我們的觀點。

  • the tower. You are the center of the universe. And so am I. And so is everyone else. And

    塔。你是宇宙的中心,我也是我也是,其他人也是。還有

  • so is no one.

    所以是沒有人。

The Universe. How big is it? Does it have a center? Does it have an edge?

宇宙,到底有多大?它有多大?它有中心嗎?它有邊緣嗎?

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